Abstract: A method for transmitting policy information between network equipment, extending protocol types of messages in layer-2, layer-3 or a higher application layer between an IP-uplink broadband user access equipment and a BRAS so as to construct a PITP to bear policy information; a PITP message includes a policy information transmission type field, an operation type field and a policy information content field, and different types of policy information are distinguished by the policy information transmission type field; transmission of the policy information is implemented through a point-to-point means or a broadcast means in layer-2, a unicast or a multicast in layer-3 or a higher application layer. The present invention implements policy information transmission, prevents account intrusions and hacker attacks, makes it convenient for the broadband user access equipment to implement dynamic QoS policy adjustment in terms of different users and makes it easy for integrated managing the online equipment.

Abstract: This disclosure provides a method and transceiver for a digital subscriber line (DSL) system. A first transceiver performs a communication with a second transceiver with a bit table including a first parameter of bit load for sub-carriers, and transmits a switch message for requesting a bit load reduction to the second transceiver when the first transceiver determines that an obtained communication performance parameter reaches or exceeds the predetermined value; and in response to the transmission of the switch message, executing a switch to a second parameter of bit load for sub-carriers at a certain symbol of a frame. The first transceiver calculates the second parameter of bit load by subtracting a corresponding bit number from the first parameter of bit load. The corresponding bit number is transmitted by the first transceiver to the second transceiver for calculating a same parameter of bit load as the second parameter of bit load.

Abstract: This disclosure provides a method and transceiver for a digital subscriber line (DSL) system. A first transceiver performs a communication with a second transceiver with a bit table including a first parameter of bit load for sub-carriers, and transmits a switch message for requesting a bit load reduction to the second transceiver when the first transceiver determines that an obtained communication performance parameter reaches or exceeds the predetermined value; and in response to the transmission of the switch message, executing a switch to a second parameter of bit load for sub-carriers at a certain symbol of a frame. The first transceiver calculates the second parameter of bit load by subtracting a corresponding bit number from the first parameter of bit load. The corresponding bit number is transmitted by the first transceiver to the second transceiver for calculating a same parameter of bit load as the second parameter of bit load.

Abstract: This disclosure provides a method and transceiver for a for a digital subscriber line (DSL) system. A first transceiver calculates a first table including a parameter of bit allocation for sub-carriers and transmits a switch message to a second transceiver connected thereto when a communication performance parameter reaches or exceeds the predetermined value; in response to the switch message, the second transceiver calculating a second table including a parameter of bit allocation for sub-carriers based on a calculation rule to keep the parameter of bit allocation within the second table as same as that within the first table, and the first transceiver communicates with the second transceiver using the first table and from a certain symbol to implement synchronous switch.

Abstract: This disclosure provides a method and transceiver for a for a digital subscriber line (DSL) system. A first transceiver calculates a first table including a parameter of bit allocation for sub-carriers and transmits a switch message to a second transceiver connected thereto when a communication performance parameter reaches or exceeds the predetermined value; in response to the switch message, the second transceiver calculating a second table including a parameter of bit allocation for sub-carriers based on a calculation rule to keep the parameter of bit allocation within the second table as same as that within the first table, and the first transceiver communicates with the second transceiver using the first table and from a certain symbol to implement synchronous switch.

Abstract: A method and transmitter receiver sets are used to perform communication in digital subscriber line technology. The method includes: acquiring communication performance parameter; the first transmitter receiver set and the second transmitter receiver set using the predetermined communication standard to perform communication when the communication performance parameter is equal to the predetermined value or greater than the predetermined value, the predetermined communication standard is respectively set in the first transmitter receiver set and the second transmitter receiver set. The bit table and the gain table predetermined are respectively stored in the first transmitter receiver set and the second transmitter receiver set. According to the method, a rapid switch to the bit table and the gain table predetermined using simple message or enquiry answer mechanism may be ensured when great wideband noise exists. There is no need of interchanging the bit table and the gain table when using this method.

Abstract: A transmission method and system of the discrete multi-tone modulation data, the method includes: generating, at a transmitting side, a first bit table according to data to be transmitted, wherein items of the first bit table include carrying data information on each line during this data transmission; modulating and transmitting, at the transmitting side, the data according to the first bit table to a receiving side; and demodulating, at the receiving side, the received data according to the first bit table to obtain corresponding data. With the transmission method and system for discrete multi-tone modulation data provided in embodiments of the present invention, the line rate and the transmission power on lines can be dynamically and timely adjusted according to information ratio of the line transmission, by using a dynamic bit table (BIT table) to carry variable information on the data carried by lines, thereby saving power resource.

Abstract: A method for transmitting policy information between network equipment, extending protocol types of messages in layer-2, layer-3 or a higher application layer between an IP-uplink broadband user access equipment and a BRAS so as to construct a PITP to bear policy information; a PITP message includes a policy information transmission type field, an operation type field and a policy information content field, and different types of policy information are distinguished by the policy information transmission type field; transmission of the policy information is implemented through a point-to-point means or a broadcast means in layer-2, a unicast or a multicast in layer-3 or a higher application layer. The present invention implements policy information transmission, prevents account intrusions and hacker attacks, makes it convenient for the broadband user access equipment to implement dynamic QoS policy adjustment in terms of different users and makes it easy for integrated managing the online equipment.

Abstract: A method for transmitting policy information between network equipment, extending protocol types of messages in layer-2, layer-3 or a higher application layer between an IP-uplink broadband user access equipment and a BRAS so as to construct a PITP to bear policy information; a PITP message includes a policy information transmission type field, an operation type field and a policy information content field, and different types of policy information are distinguished by the policy information transmission type field; transmission of the policy information is implemented through a point-to-point means or a broadcast means in layer-2, a unicast or a multicast in layer-3 or a higher application layer. The present invention implements policy information transmission, prevents account intrusions and hacker attacks, makes it convenient for the broadband user access equipment to implement dynamic QoS policy adjustment in terms of different users and makes it easy for integrated managing the online equipment.

Abstract: A method for obtaining crosstalk information includes the following steps: obtaining the transmission power variation of the crosstalk source and the noise power of the crosstalk destination; based on the obtained transmission power variation of the crosstalk source and the noise power of the crosstalk destination, obtaining the crosstalk coefficient of the frequency point in which the dynamic characteristic varies, as the crosstalk information. A device for obtaining crosstalk information comprises a crosstalk coefficient obtaining module for obtaining the crosstalk coefficient of the frequency point in which the dynamic characteristic varies. Based on the crosstalk coefficient in the lines, it is ensured that the crosstalk coefficient obtained is close to the real crosstalk information.

Abstract: A method for saving power on a digital subscriber line (xDSL) includes: generating a statistic on data rates on the xDSL, adjusting the line rate and the transmit power on the xDSL according to the statistic result, and updating the line rate of an xDSL transceiver according to the adjusted line rate and transmit power. An apparatus for saving power on an xDSL includes a data rate statistics unit, a line rate adjustment policy unit, a line parameter adjusting unit, and a line rate updating unit for an xDSL transceiver. According to the embodiments of the present invention the average transmit power of the xDSL line can be reduced effectively and energy can be saved.

Abstract: A method, apparatus, and system for crosstalk test on multi-subscriber communication lines. The core of the invention is: loading a group of orthogonal spread spectrum codes to the transmitting side of each line, and testing the crosstalk of xSDL lines based on the received signal vector at the receiving side so that the source, amplitude, and phase of the crosstalk can be identified. With the invention, crosstalk test can be implemented in real time on xSDL lines without impacting the transmission performance of other lines. In addition, the test result shows how many lines have a significant impact on the line under test and reflects the severity of the impact, providing a powerful basis for dynamic spectrum management, and optimization of DSLAM system performance.

Abstract: Embodiments of the present invention provide a method and a device for crosstalk test in multi-subscriber communication line. The core of embodiments includes: first, transmitting a test signal in a selected line; then, receiving the signal in the line to be tested, and calculating the received signal according to the transmitted test signal; thus, determining whether there is crosstalk between the line to be tested and the selected line according to the calculation result, as well as the value of the crosstalk if the crosstalk exists.

Abstract: The present invention relates to a method and an apparatus for TDR (time domain reflection) test of a transmission line. In the method, first, a test signal meeting the test requirement of self-correlation and mutual-correlation is determined and transmitted in the transmission line, in which the test signal may be a band-limited random signal, a frequency agility signal, or a regular frequency modulation signal. Then, a TDR test is performed according to the test signal transmitted in the transmission line. The SELT (Single-End Line Test) apparatus configured in accordance with the TDR test solution in the present invention has a good adaptability to environment, a high test accuracy, and an excellent capability of noise resistance. The method of the present invention is very useful for TDR test of large-scaled DSLAM (DSL Access Multiplexer) equipments.

Abstract: A method and transmitter receiver sets are used to perform communication in digital subscriber line technology. The method includes: acquiring communication performance parameter; the first transmitter receiver set and the second transmitter receiver set using the predetermined communication standard to perform communication when the communication performance parameter is equal to the predetermined value or greater than the predetermined value, the predetermined communication standard is respectively set in the first transmitter receiver set and the second transmitter receiver set. The bit table and the gain table predetermined are respectively stored in the first transmitter receiver set and the second transmitter receiver set. According to the method, a rapid switch to the bit table and the gain table predetermined using simple message or enquiry answer mechanism may be ensured when great wideband noise exists. There is no need of interchanging the bit table and the gain table when using this method.

Abstract: A method and device for reducing a surrounding coupling noise are disclosed. The method and device include receiving a signal from a receiving end of a line to be processed and obtaining a reference noise signal; determining a weight coefficient for adjusting the reference noise signal; and filtering the reference noise signal with a transfer function configured by the determined weight coefficient, superposing the filtered signal with the signal received by the receiving end of the line to be processed, and outputting the superposed signal.

Abstract: A method for saving power on a digital subscriber line (xDSL) includes: generating a statistic on data rates on the xDSL, adjusting the line rate and the transmit power on the xDSL according to the statistic result, and updating the line rate of an xDSL transceiver according to the adjusted line rate and transmit power. An apparatus for saving power on an xDSL includes a data rate statistics unit, a line rate adjustment policy unit, a line parameter adjusting unit, and a line rate updating unit for an xDSL transceiver. According to the embodiments of the present invention the average transmit power of the xDSL line can be reduced effectively and energy can be saved.

Abstract: A method for obtaining crosstalk information includes the following steps: obtaining the transmission power variation of the crosstalk source and the noise power of the crosstalk destination; based on the obtained transmission power variation of the crosstalk source and the noise power of the crosstalk destination, obtaining the crosstalk coefficient of the frequency point in which the dynamic characteristic varies, as the crosstalk information. A device for obtaining crosstalk information comprises a crosstalk coefficient obtaining module for obtaining the crosstalk coefficient of the frequency point in which the dynamic characteristic varies. Based on the crosstalk coefficient in the lines, it is ensured that the crosstalk coefficient obtained is close to the real crosstalk information.

Abstract: A transmission method and system of the discrete multi-modulation data, the method includes: generating, at a transmitting side, a first bit table according to data to be transmitted, wherein items of the first bit table include carrying data information on each line during this data transmission; modulating and transmitting, at the transmitting side, the data according to the first bit table to a receiving side; and demodulating, at the receiving side, the received data according to the first bit table to obtain corresponding data. With the transmission method and system for discrete multi-modulation data provided in embodiments of the present invention, the line rate and the transmission power on lines can be dynamically and timely adjusted according to information ratio of the line transmission, by using a dynamic bit table (BIT table) to carry variable information on the data carried by lines, thereby saving power resource.

Abstract: A method, apparatus, and system for crosstalk test on multi-subscriber communication lines. The core of the invention is: loading a group of orthogonal spread spectrum codes to the transmitting side of each line, and testing the crosstalk of xSDL lines based on the received signal vector at the receiving side so that the source, amplitude, and phase of the crosstalk can be identified. With the invention, crosstalk test can be implemented in real time on xSDL lines without impacting the transmission performance of other lines. In addition, the test result shows how many lines have a significant impact on the line under test and reflects the severity of the impact, providing a powerful basis for dynamic spectrum management, and optimization of DSLAM system performance.